Function write_table_header

examples/gen-docs/gen-docs.cpp:28–31

};

static void write_table_header(std::ostringstream & ss) {
    ss << "| Argument | Explanation |\n";
    ss << "| -------- | ----------- |\n";
}

static void write_table_entry(std::ostringstream & ss, const common_arg & opt) {
    ss << "| `";